I have a GWF, but have not been well enough to be on an eating program. I have found the GWF to be incredibly valuable to understand everything that is happening. I have always been frustrated with any weight loss program because I always felt I was shooting at an invisible target. Yes, I could manage the food intake part, but was sort of flying blind on the calories burned part. I always found this to be completely demotivating. Now with the GWF I have a really clear view of my calories burned each day as well as my sleep patterns. For me that is really helpful since I am a notoriously poor sleeper.
Anyway, when I am well enough I plan to combine the GWF and an eating program and suspect it will be incredibly helpful.
Good luck,
Shayne